Vat dyestuffs of the peri-naphthindenone series



Patented May 7, 1940 VATDYESTUFFSI- or THE PERI-NAPHTHIN DENONE spams Karl -Koeberle, Werner Rohland, and :Ghristian I "Steigerwa-ld, Ludwigshafen-on-.the-Rhine,.Ger-

many, assignors to General Aniline & ,Film Corporation, a corporation of Delaware No Drawing. Original application June12, 1937,

Serial No. 147,924.. Divided and this application Marcli s, 1938, Serial No. 194,616. -In

Germany, July 4, 1936 1 Claim.

This invention relates to vat dyestuffs of the naphthindenone series. This application is a division of our application Ser. No. 147,924, filed June 12, 1937.

We have found that new, vat dyestuii's of the naphthindenone series are obtained by treating derivatives of naphtl'iindenones having at least one reactive 6- or 7-position with alkaline agents.

A great variety of derivatives of naphthindenones maybe used as initial materials provided that they contain at least one reactive 6- or 7-position. The following formula of naphthindenone illustrates the numeration of. its positions:

These said positions 6 and 7, which are also' named peri-positions, are reactive when they contain either hydrogen alone or a radicle readily capable of being split 011", as for. example halogen atoms or nitro groups. For example there may be mentioned as initial materials naphthindenones having two free peri positions and containing in the otherrpositions of the molecule halogen atoms and /or alkyl, alkoxy, cyano, carboxyl or amino groups, and naphthindenones containing in the 6- or 7-position a halogen atom or a nitro group and if desired any further of the said atoms or atomic groups. Finally there may also be used naphthindenones containing in the 6- or 7-position a radicle incapable of being split off and having a reactive ortho-position, as for example aroyl radicles, radicles of aminoanthraquinones, aminoanthrapyrimidines, pyrazolanthrones, aminoazabenzanthrones, aminoazanthraquinones, aminopyridinoanthraquinones and aminobenzanthraquinones, and containing hydrogen or aradicle which is readily split off in the other peri-position. They may also contain any further of the said atoms or groups. Methods for the preparation of the starting materials for the purpose of the present invention are described in the U. S. Patentsby heating the initial -materials, ,if desired with an addition of diluents, such as aliphatic alcohols, with alkali metal hydroxides.v Vat dyestufis which dye vegetable and animal fibers a great variety of shades are thus obtained in excellent yields. I

The following examples will further illustrate how the said invention may be carried out in practice but the invention is not restricted to these examples. The parts are by weight.

Example 1 25 parts of Z-chlornaphthindenone (prepared by acting with glycerinein the presence of sulphuric acid on 1-hydroxy-'2-chlornaphthalene) are introduced at 120 .0. intoa solution of 160 parts of potassium hydroxide in parts of ethanol, themixture heated slowly to 140 C. a

whichcottonis dyed violet shades.v

Example 2 5 parts of Z-aminonaphthindenoh (prepared by actingfwith paratoluene 'sulfonic acid amide on ZChlor-naphthindenone and saponification of the paratoluene sulionic acid naphthindenonyl amide formed) are introduced at G. into a mixture of 50 parts of potassium hydroxide and 40 parts. of ethanol and the mixture is heated for about 2 hours atfrom 140 to 150 C. It is then poured into water and the dyestuff is precipitated by leading in air, filtered ofi by suction and washed. It dissolves in concentrated sulphuric acid-giving a green-blue coloration and dyes vegetable fibers grey shades from a pale red vat. 1

' In a similar manner there is obtained from 2- dimethylaminona-phthindenone (prepared by reacting dim'ethylamine. with 2-bromnaphthindenone, which latter can be obtained by brominatingnapththindenone) a dyestuff which dissolves in concentrated sulphuric acid giving a blue colorationand whichyields violet dyeings on cotton froma pale red vat.

' Example 3 151mm of 2--(l -anthraquinomfll-aminolnaphthindenone (obtainable by. causing l-aminoanthraquinone to act on 2-.bromnaphthindenone) are introduced into a solution, heated to 0., of 3.0 parts of potassium. hydroxide in 20 parts of methanol and the mixture stirred for about 3 hours at from to C. It

is then poured into water, air is led through the liquid and the dyestuff is filtered oil by suction and washed. It dissolves in concentrated sulphuric acid giving a blue-green coloration and yields olive-green dyeings from a violet vat.

In a similar manner there is obtained from 2) (2' -anthraquinonyl-amino) naphthindenone (prepared by reacting Z-aminoanthraquinone with 2-brom-naphthindenone) a dyestuff which dissolves in concentrated sulphuric acid giving an olive-green coloration and which yields grey dyeings from a violet vat. From 2-pyrazolanthronylnaphthindenone (prepared by reacting 1.9-pyrazoloanthrone with Z-brQm-naphthindenone) there is obtained a dyestufi which dissolves in concentrated sulphuric acid giving a reddish violet coloration and which yields a bluegreen vat from which cotton is dyed yellow-red shades.

If 2 (5 -anthrapyrimidylamino) -naphthindenone (prepared by reacting 5-aminoanthrap-yrimidine with Z-brom-naphthindenone) be treated in the manner described in the first paragraph of this example, a dyestufi is obtained which dissolves in concentrated sulphuric acid giving a green coloration and which dyes cotton violetgrey shades from a violet vat.

Example 4 parts of 2.6-(di-l'-anthraquinonylamino)- naphthindenone (obtainable by causing 2 molecular proportions of l-aminoanthraquinone to act on one molecular proportion of 2.6-dibromonaphthindenone which may be prepared by causing bromine to act on Z-brOm-naphthindenone) are introduced into a solution, heated to C., of 450 parts of potassium hydroxide in 350 parts of ethanol, the mixture being heated for some hours at from to 145 C. It is then allowed to cool and is poured into water, the dyestuff being precipitated by leading in air, filtered ofi by suction and washed. It dissolves in concentrated sulphuric acid giving a red-brown coloration and dyes cotton olive-green shades from a red-brown vat.

If 2.6-dipyrazolanthronylnaphthindenone (prepared by reacting two molecular proportions of 1.9-pyrazoloanthrone with one molecular proportion of 2.6-dibromnaphthindenone) be treated in the manner described, a dyestufi is obtained which dissolves in concentrated sulphuric acid giving a red-brown coloration and which dyes vegetable fibers yellow-brown shades from a green vat.

Example 5 10 parts of 2-(1-anthraquinonylamino)-6- pyrazolanthronylnaphthindenone (obtainable by causing one molecular proportion of 1.9-pyrazoloanthrone to act on one molecular proportion of Z-chlor-G-brom-naphthindenone and reacting the 2-chlor-6-pyrazolanthronylnaphthindenone formed with one molecular proportion of 1- aminoanthraquinone, the 2-chlor-6-bromnaphthindenone itself being prepared by acting with bromine on 2-chlor-naphthindenone) are introduced into a solution, heated to 120 C., of 50 parts of potassium hydroxide in 40 parts of ethanol, the mixture being stirred for 3 hours at from to 150 C. The Whole is then allowed to cool and poured into water; the dyestuff is precipitated by means of air, filtered ofi by suction and washed. It dissolves in concentrated sulphuric acid giving a blue coloration and dyes vegetable fibers violetish grey shades from a green vat.

Example 6;

3 parts of benzoylnaphthindenone (obtainable by the reaction of naphthindenone with benzo-yl v chloride in the presence of pyridine) are intro- Ewample 7 5 parts of 2-chlor-6-(1'-anthraquinonylamino) naphthindenone (prepared by causing one molecular proportion of l-amino-anthraquinone to act on one molecular proportion of 2-chlor-6-bromnaphthindenone) are introduced into a mixture, heated to 115 C., of 25 parts of potassium hydroxide and 20 parts of methanol, the mixture being heated for 2% hours at from 130 to 0., while stirring. After cooling, it is added to water and the dyestufi is precipitated by means of air, filtered off by suction and washed with water. It dissolves in concentrated sulphuric acid giving a violet-red coloration and dyes vegetable fibers green shades from a violet vat.

In a similar manner there is obtained from 2-chlor-6-pyrazolanthronylnaphthindenone (prepared by reacting one molecular proportion of 1.9-pyrazol0anthrone with one molecular proportion of 2-chlor-6-brom-naphthindenone) a dyestuff which dissolves in concentrated sulphuric acid giving ablue-green coloration and which dyes vegetable fibers blue shades from a violet vat.

What we claim is:

The vat dyestufi' or the peri-naphthindenone series having the formula 10 \OKNH KARL KOEBERLE. WERNER ROHLAND. CHRISTIAN STEIGERWALD. 

